An apparatus includes a first and second driving circuits that energize a first and third heat generating blocks; a first and second temperature detection members that detect each temperature of the first and third heat generating blocks; a control portion that controls the first and second driving circuits according to at least one of the temperatures detected by the first and second temperature detection members; and a connection switching portion that selectively connects any one of the first and second driving circuits to a second heat generating block according to a switching instruction from the control portion. The control portion controls energization of the second heat generating block together with a heat generating block which is energized by the driving circuit connected to the second heat generating block.

A fixing device includes a heating rotating member having a conductive layer and an exposed portion in which the conductive layer is partially exposed, and a roller including a metal core and an elastic portion, the roller forming a nip portion with the heating rotating member, the elastic portion being elastically deformed in a region where the nip portion is formed, wherein an annular conductive member provided in a longitudinal end portion of the metal core is in contact with the exposed portion of the heating rotating member while elastically deformed, and wherein in a state where the roller is not mounted to the fixing device, an outer diameter of the conductive member is smaller than an outer diameter of the elastic portion.

Methods and systems for electrically heating and cooling rollers is described. A system may include one or more rollers comprising one or more electrical heating elements and one or more air channels. The one or more electrical heating elements may integrated to a power source and control circuit through an electrical contact on at least one end of the roller. The control circuit may additionally receive input from one or more temperature sensors.

Provided is a heater including: a substrate that has electrical conductivity; a first insulation portion that is provided on a first surface of the substrate, has an insulation property; at least one heat generation body that is provided on the first insulation portion; a second insulation portion that is provided on a second surface of the substrate which is opposite to the first surface, has an insulation property; at least one detection unit that is provided on at least one of the first insulation portion and the second insulation portion; and a first wiring which is provided on at least one of the first insulation portion and the second insulation portion, and in which one end is electrically connected to one terminal of the detection unit and the other end is electrically connected to the substrate having the electrical conductivity.

A fuser assembly for a device capable of printing, including: at least one heater roller; at least one first heater element located within the at least one heater roller; at least one second heater element located within the at least one heater roller; an electrical line; a power input component including a first power input for the at least one first heater element, a second power input for the at least one second heater element and a third power input for the electrical line; a first electrical circuit designed to operate at a first voltage range and including the at least one heater element and the first electrical line; and a second electrical circuit designed to operate at a second voltage ranged, different from the first voltage range and including the first and second heater elements.

A heated roll with a circular cylindrical casing tube 1 made from thermally conductive metal, which is closed at its end faces with caps 2, 3. One or more electric heating mats 8 are arranged inside the casing tube 1. By at least one connection pin 5, which is arranged at one cap 2, connection cables 11 are guided for supplying the heating mats 8 with electric power. Annular brushing bodies 7 are fastened at the connection pin 5 and serve for the electric contacting of the connection cables 11. A tensioning device 9, 14, 15 is arranged inside the casing tube 1, which presses the heating mats 8 permanently against the interior surface of the casing tube 1.

A heater including a substrate, a first heat generating line provided on the substrate and in a longitudinal direction of the substrate, the first heat generating line being divided into a plurality of heat generating blocks in the longitudinal direction, the plurality of heat generating blocks being controllable independently, and a second heat generating line provided on the substrate and in the longitudinal direction of the substrate, the second heat generating line being divided into a plurality of heat generating blocks in the longitudinal direction, the plurality of heat generating blocks being controllable independently. In the heater, divided positions of the first heat generating line and divided positions of the second heat generating line are different.

A caster tip for a twin roll continuous strip caster for non-ferrous metals. The caster tip includes a caster tip body made primarily of a ceramic material, and an electric resistance heater thermally connected to the caster tip body for pre-heating the caster tip body to a predetermined temperature.

A fuser assembly for a device capable of printing, including: at least one heater roller; at least one first heater element located within the at least one heater roller; at least one second heater element located within the at least one heater roller; an electrical line; a power input component including a first power input for the at least one first heater element, a second power input for the at least one second heater element and a third power input for the electrical line; a first electrical circuit designed to operate at a first voltage range and including the at least one heater element and the first electrical line; and a second electrical circuit designed to operate at a second voltage ranged, different from the first voltage range and including the first and second heater elements.

An object is to provide a self-heat-generating fixing roller that has a simple structure and good durability and that can be easily produced. A self-heat-generating fixing roller according to an embodiment of the present invention includes a columnar core bar, a heat-insulating layer stacked on an outer circumferential side of the core bar, a heat-generating layer stacked on an outer circumferential side of the heat-insulating layer and heated by supplying electricity, and a mold-releasing layer stacked on an outer circumferential side of the heat-generating layer. The heat-insulating layer preferably contains a matrix containing a synthetic resin or rubber as a main component, and a plurality of pores contained in the matrix. The heat-generating layer preferably contains a matrix containing a synthetic resin or rubber as a main component, and a plurality of electrically conductive fillers contained in the matrix.